Chevrolet 1500 Differential Install Kit - Revolution Gear & Axle - 4.88 Ratio Gear - '98-'08. This install kit is built for owners of 1998–2008 Chevrolet 1500 trucks who need a reliable 4.88 gear ratio solution for GM 8.6in and GM 8.25in IFS applications.

The Revolution Gear & Axle package is intended for vehicle builders and enthusiasts changing final drive ratio for improved low-end response, towing capability, or to match drivetrain modifications. It’s specified for Chevy 1500 models from the stated years and engineered to work with GM 8.6-inch and 8.25-inch IFS differentials. The kit supports a focused change in axle ratio without requiring unrelated upgrades, helping preserve vehicle compatibility while delivering predictable performance characteristics for street, trail, or tow use.

Features

• 4.88 final drive ratio for stronger low-end acceleration and towing leverage
• Fits 1998–2008 Chevrolet 1500 applications
• Compatible with GM 8.6in and GM 8.25in IFS differentials
• Manufactured by Revolution Gear & Axle to match OE mounting dimensions

If you have questions about fitment, installation, or whether this ratio suits your build, call us directly — we can help you choose the right setup. We offer installation and customization services at two locations: Austin, Texas and the Los Angeles, California area. Call 512-982-9393 (TX) or 562-981-6800 (CA) for details or to schedule service. If you’re considering multiple items, contact us for shipping discounts. We install on premises at both locations.

CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov